4138931543 has 2 divisors, whose sum is σ = 4138931544. Its totient is φ = 4138931542.

The previous prime is 4138931501. The next prime is 4138931611. The reversal of 4138931543 is 3451398314.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4138931543 - 2¹² = 4138927447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4138931543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4138931743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069465771 + 2069465772.

It is an arithmetic number, because the mean of its divisors is an integer number (2069465772).

Almost surely, 2^4138931543 is an apocalyptic number.

4138931543 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138931543 is an equidigital number, since it uses as much as digits as its factorization.

4138931543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 4138931543 is about 64334.5283887276. The cubic root of 4138931543 is about 1605.5706272229.

The spelling of 4138931543 in words is "four billion, one hundred thirty-eight million, nine hundred thirty-one thousand, five hundred forty-three".